JP2012075260A - Charge control device - Google Patents

Charge control device Download PDF

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JP2012075260A
JP2012075260A JP2010218817A JP2010218817A JP2012075260A JP 2012075260 A JP2012075260 A JP 2012075260A JP 2010218817 A JP2010218817 A JP 2010218817A JP 2010218817 A JP2010218817 A JP 2010218817A JP 2012075260 A JP2012075260 A JP 2012075260A
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voltage
charging
output
cell
charger
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JP5562195B2 (en
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Susumu Yamauchi
晋 山内
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Hitachi Ltd
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Hitachi Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • B60L58/15—Preventing overcharging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/21—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having the same nominal voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/26—Rail vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/547—Voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/549—Current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00302—Overcharge protection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

PROBLEM TO BE SOLVED: To charge an electrical storage device up to a large amount of charge with a high degree of accuracy.SOLUTION: A charge control device controls a charger of an electrical storage device which comprises a plurality of serially-connected cells and a cell voltage detection circuit for detecting a cell voltage of each cell. The charge control device includes an output voltage detection circuit for detecting an output voltage of the charger, and a control circuit for controlling electrical storage device charging performed by the charger, on the basis of the result of comparison between a charging target voltage V0 of the electrical storage device and the output voltage detected by the output voltage detection circuit and the result of comparison between the charging target voltage V0 and the total value of the cell voltages detected by the cell voltage detection circuit.

Description

本発明は充電制御装置に関する。   The present invention relates to a charge control device.

地球温暖化や大気汚染などの環境問題への関心の高まりとともに、自動車に対しても燃費低減や排気ガス中の有害物質の削減を義務付けた規制が強化されつつある。このような中、電気自動車やモータと内燃機関を組合せたハイブリッド自動車の開発が進められ、普及しつつある。これらの車両には、モータの動力源となる蓄電装置にリチウム電池やニッケル水素電池などが使用されており、例えばリチウム電池を使用した蓄電装置では、１００個前後のリチウム電池セルが直列接続され３００〜４００Ｖの出力電圧を得ている。
これらの直列接続されたセルには、セルコントローラと呼ばれる電圧検出回路が付設され、各セル毎の出力電圧であるセル電圧や、蓄電装置の充電量である充電レベル等の情報を検知し、接続された蓄電装置のコントローラと上記セル情報や充放電制御情報の送受信を行う。充電器はその出力端がリレーを介して蓄電装置と接続され、充電制御装置は充電器の状態と蓄電装置の情報に基づいて蓄電装置が所定の充電レベルになるよう充電を制御する。電動自動車では蓄電装置の充電電力量が走行距離に直結するため、充電される電力量は多い方が望ましい。
しかし、蓄電装置には劣化防止や安全の面から電圧の範囲に制限があり、電圧を制限内に制御して蓄電装置の電力を効率的に使用するためには高精度な電圧センサが必要なる。
一方、電圧センサの高精度化は電圧センサ、周辺回路、リファレンス電源などの高性能化に繋がり、充電器価格の上昇に繋がるため低コストで且つ高精度な電圧検出方法が重要となる。
このような問題を解決するために、例えば下記特許文献１には蓄電装置の充電器における制御方法が開示されている。この制御方法では、充電器の制御に用いる電圧センサの電圧検出精度が、製造ばらつきや温度や電圧など測定環境の影響による特性のずれによって低下するため、温度センサの値や蓄電装置内のセル電圧の情報に基づいて電圧センサの値を補正し、電圧検出精度の低下を抑制している。 With increasing interest in environmental issues such as global warming and air pollution, regulations that require automobiles to reduce fuel consumption and reduce harmful substances in exhaust gas are being strengthened. Under such circumstances, development of hybrid vehicles combining an electric vehicle or a motor and an internal combustion engine has been promoted and is becoming popular. In these vehicles, a lithium battery, a nickel metal hydride battery, or the like is used as a power storage device serving as a power source for the motor. For example, in a power storage device using a lithium battery, about 100 lithium battery cells are connected in series. An output voltage of ~ 400V is obtained.
These series-connected cells are provided with a voltage detection circuit called a cell controller, which detects information such as the cell voltage, which is the output voltage for each cell, and the charge level, which is the charge amount of the power storage device. The cell information and charge / discharge control information are transmitted / received to / from the controller of the stored power storage device. The output terminal of the charger is connected to the power storage device via a relay, and the charge control device controls charging based on the state of the charger and information on the power storage device so that the power storage device reaches a predetermined charge level. In an electric vehicle, the amount of electric power charged by the power storage device is directly linked to the travel distance, and therefore it is desirable that the amount of electric power charged is large.
However, the voltage range of the power storage device is limited from the viewpoint of preventing deterioration and safety, and a highly accurate voltage sensor is required to efficiently use the power of the power storage device by controlling the voltage within the limit. .
On the other hand, higher accuracy of the voltage sensor leads to higher performance of the voltage sensor, peripheral circuit, reference power supply, etc., and leads to an increase in the price of the charger. Therefore, a low-cost and high-accuracy voltage detection method is important.
In order to solve such a problem, for example, Patent Document 1 below discloses a control method for a battery charger charger. In this control method, the voltage detection accuracy of the voltage sensor used to control the charger decreases due to variations in characteristics due to manufacturing variations and the influence of the measurement environment such as temperature and voltage, so the value of the temperature sensor and the cell voltage in the power storage device Based on this information, the value of the voltage sensor is corrected to suppress a decrease in voltage detection accuracy.

特開２０００−２９９９３９号公報JP 2000-299939 A

上述した従来の充電制御方法では、電圧センサは蓄電装置内の電圧センサを使用して充電器を制御し、同じく蓄電装置内の温度センサで電圧センサの値を補正するか、または蓄電装置内の代表セルの電圧をセル数倍して蓄電装置の総電圧を推定し、電圧センサの値を補正している。しかし、このような充電制御方法では、例えば蓄電装置内のセル電圧も複数セル間でのばらつきの他、製造時のばらつき、経年使用による特性変化によって個々のセルで特性のばらつきが生じるため、代表セルの電圧のセル数倍の電圧と蓄電装置の総電圧との間に誤差が生じ、蓄電装置の総電圧を正確に検知することはできないため、過充電を防止する観点から蓄電装置を高い充電量まで高精度に充電できないという問題がある。   In the conventional charge control method described above, the voltage sensor uses the voltage sensor in the power storage device to control the charger, and similarly corrects the value of the voltage sensor with the temperature sensor in the power storage device, or The voltage of the representative cell is multiplied by the number of cells to estimate the total voltage of the power storage device, and the value of the voltage sensor is corrected. However, in such a charge control method, for example, the cell voltage in the power storage device also varies among multiple cells, as well as variations in manufacturing, and variations in characteristics due to aging, resulting in variations in characteristics of individual cells. An error occurs between the voltage of the number of cells multiplied by the number of cells and the total voltage of the power storage device, and the total voltage of the power storage device cannot be accurately detected. There is a problem that the battery cannot be charged with high accuracy.

(１) 請求項１の発明は、直列接続された複数のセルと各セルのセル電圧を検出するセル電圧検出回路とを有する蓄電装置の充電器を制御する充電制御装置であって、前記充電器の出力電圧を検出する出力電圧検出回路と、前記蓄電装置の充電目標電圧と前記出力電圧検出回路により検出された前記出力電圧との比較結果、および前記充電目標電圧と前記セル電圧検出回路により検出された前記セル電圧の合計値との比較結果に基づいて、前記充電器による前記蓄電装置の充電を制御する制御回路とを備える。
(２) 請求項２の発明は、請求項１に記載の充電制御装置において、前記制御回路は、前記出力電圧検出回路により検出された前記出力電圧が前記充電目標電圧よりも低い所定の電圧に到達するまでは、前記充電目標電圧と前記出力電圧との比較結果に基づいて充電を制御し、前記出力電圧が前記所定の電圧に到達した後は、前記充電目標電圧と前記セル電圧検出回路により検出された前記セル電圧の合計値との比較結果に基づいて充電を制御する。
(３) 請求項３の発明は、請求項１に記載の充電制御装置において、前記制御回路は、前記出力電圧検出回路により検出された前記出力電圧が前記充電目標電圧よりも低い所定の電圧に到達するまでは、前記充電目標電圧と前記出力電圧との比較結果に基づいて充電を制御し、前記出力電圧が前記所定の電圧に到達した後は、前記セル電圧検出回路により検出された前記セル電圧の合計値により前記出力電圧検出回路により検出された前記出力電圧を補正し、前記充電目標電圧と補正後の前記出力電圧との比較結果に基づいて充電を制御する。
(４) 請求項４の発明は、直列接続された複数のセルと各セルのセル電圧を検出するセル電圧検出回路とを有する蓄電装置の充電器を制御する充電制御装置であって、前記蓄電装置の充電目標電圧と前記セル電圧検出回路により検出された前記セル電圧の合計値との比較結果に基づいて、前記充電器による前記蓄電装置の充電を制御する制御回路を備える。
(５) 請求項５の発明は、請求項１〜４のいずれか一項に記載の充電制御装置において、前記制御回路は、前記充電目標電圧と前記出力電圧または前記セル電圧の合計値との比較結果に基づいて、前記充電器の出力電力または出力電流の目標値を決定する目標値決定回路を有し、前記目標値決定回路により決定された目標値により前記充電器の出力電力または出力電流を制御する。
(６) 請求項６の発明は、請求項５に記載の充電制御装置において、前記目標値決定回路は、前記充電器の出力電力が前記目標値に到達した後は、前記充電器の出力電力が目標値を越えないように前記充電器の出力電流の目標値を低減する。
(７) 請求項７の発明は、請求項５に記載の充電制御装置において、前記目標値決定回路は、前記出力電圧検出回路により検出された前記出力電圧または前記セル電圧検出回路により検出された前記セル電圧の合計値が前記充電目標電圧よりも低い所定の電圧に到達した後は、前記充電器の出力電流の目標値を徐々に低減する。
(８) 請求項８の発明は、請求項１〜７のいずれか一項に記載の充電制御装置において、前記制御回路は、前記セル電圧検出回路により各セルの電圧検出を行うときに、前記充電器の出力電流を０にして充電を一時停止する。 (1) The invention of claim 1 is a charge control device for controlling a battery charger of a power storage device having a plurality of cells connected in series and a cell voltage detection circuit for detecting a cell voltage of each cell, An output voltage detection circuit for detecting the output voltage of the storage device, a comparison result between the charge target voltage of the power storage device and the output voltage detected by the output voltage detection circuit, and the charge target voltage and the cell voltage detection circuit A control circuit that controls charging of the power storage device by the charger based on a comparison result with the detected total value of the cell voltages.
(2) According to a second aspect of the present invention, in the charge control device according to the first aspect, the control circuit sets the output voltage detected by the output voltage detection circuit to a predetermined voltage lower than the target charge voltage. Until reaching, the charging is controlled based on the comparison result between the charging target voltage and the output voltage. After the output voltage reaches the predetermined voltage, the charging target voltage and the cell voltage detection circuit Charging is controlled based on a comparison result with the detected total value of the cell voltages.
(3) The invention according to claim 3 is the charge control device according to claim 1, wherein the control circuit sets the output voltage detected by the output voltage detection circuit to a predetermined voltage lower than the charge target voltage. Until reaching, the charging is controlled based on a comparison result between the charging target voltage and the output voltage, and after the output voltage reaches the predetermined voltage, the cell detected by the cell voltage detection circuit The output voltage detected by the output voltage detection circuit is corrected by the total value of the voltages, and charging is controlled based on a comparison result between the charging target voltage and the corrected output voltage.
(4) The invention of claim 4 is a charge control device for controlling a charger of a power storage device having a plurality of cells connected in series and a cell voltage detection circuit for detecting a cell voltage of each cell, wherein the power storage device And a control circuit that controls charging of the power storage device by the charger based on a comparison result between a target charging voltage of the device and a total value of the cell voltages detected by the cell voltage detection circuit.
(5) According to a fifth aspect of the present invention, in the charge control device according to any one of the first to fourth aspects, the control circuit is configured to calculate the charge target voltage and the output voltage or the total value of the cell voltages. A target value determining circuit for determining a target value of the output power or output current of the charger based on the comparison result, and the output power or output current of the charger according to the target value determined by the target value determining circuit; To control.
(6) The invention according to claim 6 is the charge control device according to claim 5, wherein the target value determination circuit is configured to output the output power of the charger after the output power of the charger reaches the target value. The target value of the output current of the charger is reduced so that does not exceed the target value.
(7) The invention according to claim 7 is the charge control device according to claim 5, wherein the target value determination circuit is detected by the output voltage detected by the output voltage detection circuit or the cell voltage detection circuit. After the total value of the cell voltages reaches a predetermined voltage lower than the charging target voltage, the target value of the output current of the charger is gradually reduced.
(8) The invention according to claim 8 is the charging control device according to any one of claims 1 to 7, wherein the control circuit performs voltage detection of each cell by the cell voltage detection circuit. Charging is temporarily stopped by setting the output current of the charger to 0.

本発明によれば、蓄電装置の総電圧を正確に検知して蓄電装置を高い充電量まで高精度に充電することができる。   According to the present invention, it is possible to accurately detect the total voltage of the power storage device and charge the power storage device to a high charge amount with high accuracy.

蓄電装置、充電器および一実施の形態の充電制御装置を搭載した電動自動車における電力系統の構成例を示す図The figure which shows the structural example of the electric power system in the electric vehicle carrying the electrical storage apparatus, the charger, and the charge control apparatus of one embodiment 図１に示す充電制御装置１０７の構成例を示す図The figure which shows the structural example of the charging control apparatus 107 shown in FIG. 図２に示す目標値決定部２０３による目標値決定方法の一例を示す図The figure which shows an example of the target value determination method by the target value determination part 203 shown in FIG. 図２に示す目標値決定部２０３による目標値決定方法の他の一例を示す図The figure which shows another example of the target value determination method by the target value determination part 203 shown in FIG. 一実施の形態の充電制御プログラムを示すフローチャートThe flowchart which shows the charge control program of one embodiment 図５に示す充電制御プログラムを実行した場合の出力電圧、出力電力、出力電流の目標値と実際に出力検出部２０１（図２参照）で検出される値との関係の一例を示す図The figure which shows an example of the relationship between the target value of output voltage at the time of performing the charge control program shown in FIG. 5, output electric power, and output current, and the value actually detected by the output detection part 201 (refer FIG. 2). 充電器１０３側の電圧センサ１０３ａにより検出した出力電圧と、蓄電装置情報受信部２０２により受信したセル電圧の合計値とを用いて充電を行う制御例を示す図The figure which shows the example of control which charges using the output voltage detected by the voltage sensor 103a by the side of the charger 103, and the total value of the cell voltage received by the electrical storage apparatus information receiving part 202 充電器側電圧センサ１０３ａにより検出した出力電圧と、蓄電装置情報受信部２０２により受信したセル電圧の合計値とを用いて充電を行う他の制御例を示す図The figure which shows the other control example which charges using the output voltage detected by the charger side voltage sensor 103a, and the total value of the cell voltage received by the electrical storage apparatus information receiver 202. 図７に示す充電制御例１にセル電圧を計測するための充電停止区間を設けた例を示す図The figure which shows the example which provided the charge stop area for measuring a cell voltage in the charge control example 1 shown in FIG. 充電器側電圧センサ１０３ａにより検出した出力電圧を蓄電装置情報受信部２０２で受信したセル電圧の合計値で補正して充電を行う制御例を示す図The figure which shows the example of control which correct | amends the output voltage detected by the charger side voltage sensor 103a with the total value of the cell voltage received by the electrical storage apparatus information receiving part 202, and performs charge.

本発明の充電制御装置を電動自動車に搭載した発明の一実施の形態を説明する。なお、本発明は電動自動車に限定されず、建設車両、電気鉄道、一般産業用電動駆動装置など、蓄電装置に充電を行う充電器のあらゆる充電制御装置に適用することができる。   An embodiment of the invention in which the charge control device of the present invention is mounted on an electric vehicle will be described. Note that the present invention is not limited to an electric automobile, and can be applied to any charging control device for a charger that charges a power storage device, such as a construction vehicle, an electric railway, and a general industrial electric drive device.

図１は、蓄電装置、充電器および一実施の形態の充電制御装置を搭載した電動自動車における電力系統の構成例を示す。電動自動車１０１は、走行の動力源となる蓄電装置１０２と、蓄電装置１０２を充電するための充電器１０３を備えている。蓄電装置１０２には、電動自動車１０１の外部の商用電源１０４から充電器１０３を介して電力が供給される。蓄電装置１０２は複数の電池セル１０２ａが直列に接続され、さらに各電池セル１０２ａの電圧（以下、セル電圧という）を検出する電圧検出回路１０５が設置されている。電圧検出回路１０５で検出されたセル電圧は蓄電装置１０２のコントローラであるBCU１０６へ送信され、BCU１０６は受信したセル電圧などの電圧情報に基づいて蓄電装置１０２の充電状態や異常状態を監視する。   FIG. 1 shows a configuration example of a power system in an electric vehicle equipped with a power storage device, a charger, and a charge control device according to an embodiment. The electric automobile 101 includes a power storage device 102 serving as a driving power source and a charger 103 for charging the power storage device 102. Electric power is supplied to the power storage device 102 from a commercial power source 104 outside the electric automobile 101 via the charger 103. In the power storage device 102, a plurality of battery cells 102a are connected in series, and a voltage detection circuit 105 for detecting the voltage of each battery cell 102a (hereinafter referred to as cell voltage) is installed. The cell voltage detected by the voltage detection circuit 105 is transmitted to the BCU 106, which is a controller of the power storage device 102, and the BCU 106 monitors the charged state or abnormal state of the power storage device 102 based on the received voltage information such as the cell voltage.

充電器１０３は出力電圧を検出する電圧センサ１０３ａ、出力電流を検出する電流センサ１０３ｂ、出力電力を検出する電力センサ１０３ｃおよび充電を制御する充電制御装置１０７を備えている。なお、充電器１０３の出力電力は電圧センサ１０３ａによる出力電圧と電流センサ１０３ｂによる出力電流の積として求めてもよく、この場合には電力センサ１０３ｃを省略することができる。充電制御装置１０７は図示しないＣＰＵやメモリなどから構成され、電動自動車１０１のコントローラであるVCU１０８を介してBCU１０６から蓄電装置１０２の状態に関する情報を受信するとともに、電圧、電流および電力センサ１０３ａ〜１０３ｂからセンサ信号を入力し、これらの情報に基づいて蓄電装置１０２の充電を制御する。なお、蓄電装置１０２の状態に関する情報はBCU１０６やVCU１０８を介さずに、電圧検出回路１０５から直接入力する構成としてもよい。   The charger 103 includes a voltage sensor 103a that detects an output voltage, a current sensor 103b that detects an output current, a power sensor 103c that detects output power, and a charge control device 107 that controls charging. The output power of the charger 103 may be obtained as the product of the output voltage from the voltage sensor 103a and the output current from the current sensor 103b. In this case, the power sensor 103c can be omitted. The charging control device 107 includes a CPU and a memory (not shown), receives information related to the state of the power storage device 102 from the BCU 106 via the VCU 108 that is a controller of the electric vehicle 101, and from the voltage, current, and power sensors 103a to 103b. A sensor signal is input, and charging of the power storage device 102 is controlled based on the information. Note that information regarding the state of the power storage device 102 may be directly input from the voltage detection circuit 105 without using the BCU 106 or the VCU 108.

図２は、図１に示す充電制御装置１０７の構成例を示す。なお、この一実施の形態では充電器１０３に充電制御装置１０７を一体に構成する例を示すが、充電制御装置１０７を独立した装置として構成してもよいし、あるいは充電制御装置１０７をVCU１０８のマイクロコンピューターのソフトウエア形態として構成することも可能である。充電制御装置１０７は、出力検出部２０１、蓄電装置情報受信部２０２、目標値決定部２０３および出力決定部２０４を備えている。出力検出部２０１は、充電器１０３の出力電圧、出力電流および出力電力を検出するためのセンサ１０３ａ〜１０３ｃ（図１参照）からセンサ信号を受信し、充電器１０３の出力電圧、出力電流および出力電力へ変換する。なお、充電器１０３に電力センサ１０３ｃを設置しない場合には、出力検出部２０１で電圧センサ１０３ａによる出力電圧と電流センサ１０３ｂによる出力電流の積を求め、充電器１０３の出力電力を求める。   FIG. 2 shows a configuration example of the charging control apparatus 107 shown in FIG. In this embodiment, an example in which the charging control device 107 is configured integrally with the charger 103 is shown. However, the charging control device 107 may be configured as an independent device, or the charging control device 107 may be connected to the VCU 108. It is also possible to configure as a microcomputer software form. The charging control device 107 includes an output detection unit 201, a power storage device information reception unit 202, a target value determination unit 203, and an output determination unit 204. The output detection unit 201 receives sensor signals from the sensors 103a to 103c (see FIG. 1) for detecting the output voltage, output current, and output power of the charger 103, and outputs the output voltage, output current, and output of the charger 103. Convert to electricity. When the power sensor 103 c is not installed in the charger 103, the output detection unit 201 obtains the product of the output voltage from the voltage sensor 103 a and the output current from the current sensor 103 b to obtain the output power of the charger 103.

蓄電装置情報受信部２０２は、BCU１０６を介して蓄電装置１０２内の電圧検出回路１０５で検知した各セル電圧の計測値の合計値を受信するか、または各セル電圧の計測値を受信し合計値を計算する。ここで、各セル電圧の合計値は蓄電装置１０２の両端電圧すなわち総電圧である。目標値決定部２０３は、充電器１０３の出力電圧、出力電流、出力電力の少なくともいずれか一つの目標値を決定する。この目標値の決定方法については詳細を後述する。出力決定部２０４は、出力検出部２０１、蓄電装置情報受信部２０２および目標値決定部２０３の値に基づいて充電器１０３への指令値を決定する。   The power storage device information receiving unit 202 receives the total value of the measured values of each cell voltage detected by the voltage detection circuit 105 in the power storage device 102 via the BCU 106 or receives the measured value of each cell voltage and adds the total value Calculate Here, the total value of the cell voltages is the voltage across the power storage device 102, that is, the total voltage. The target value determination unit 203 determines at least one target value of the output voltage, output current, and output power of the charger 103. The method for determining the target value will be described later in detail. Output determining unit 204 determines a command value to charger 103 based on the values of output detecting unit 201, power storage device information receiving unit 202, and target value determining unit 203.

図３および図４に目標値決定部２０３による目標値決定方法の一例を示す。目標値決定部２０３は、充電開始時刻t0からt1までの所定時間Δt1だけ出力電流の目標値をI1に設定し、t1からt2までの所定時間Δt2では所定時間Δt3毎に出力電流の目標値を所定の減少幅ΔI1だけ減少させて充電を終了する。ここで、所定時間Δt1、Δt2、Δt3、および出力電流の目標値I1、目標値の減少幅ΔI1は充電制御装置１０７内に予め設定された値を用いるか、または充電制御装置１０７の外部からこれらの情報を受信して設定してもよい。また、目標値の減少幅ΔI1は一定ではなく徐々に減少幅ΔI1が小さくなるよう設定してもよく、この場合の出力電流の目標値は図中の破線で示すような変化となる。   3 and 4 show an example of a target value determination method by the target value determination unit 203. FIG. The target value determination unit 203 sets the target value of the output current to I1 for a predetermined time Δt1 from the charging start time t0 to t1, and sets the target value of the output current for every predetermined time Δt3 during the predetermined time Δt2 from t1 to t2. The charging is terminated after decreasing by a predetermined decrease width ΔI1. Here, the predetermined times Δt1, Δt2, Δt3, the target value I1 of the output current, and the target value decrease range ΔI1 use values preset in the charge control device 107, or these values are supplied from the outside of the charge control device 107. May be received and set. Further, the target value decrease width ΔI1 may be set so as not to be constant but gradually decrease, and the target value of the output current in this case changes as shown by a broken line in the figure.

あるいは図４に示すように、充電開始とともに出力電圧が所定電圧V1になるまで出力電流の目標値をI1に設定し、出力電圧がV1に到達した後は所定時間Δt3毎に出力電流の目標値がI2になるまで所定の減少幅ΔI1だけ減少させる方法がある。ここで、出力電圧は電圧センサ１０３ａから受信したセンサ信号、蓄電装置情報受信部２０２で受信した蓄電装置１０２のセル電圧合計値、蓄電装置情報受信部２０２で各セル電圧を受信して計算したセル電圧合計値の少なくともいずれか一つの値を用いる。また、ここでは出力電圧と出力電流の情報を用いる例を示したが、出力電力は出力電圧と出力電流の積算値であるから、出力電圧または出力電流の代わりに出力電力の値を用いて同様の方法で実施できる。   Alternatively, as shown in FIG. 4, the target value of the output current is set to I1 until the output voltage reaches the predetermined voltage V1 at the start of charging, and after the output voltage reaches V1, the target value of the output current every predetermined time Δt3. There is a method of decreasing by a predetermined decrease width ΔI1 until becomes I2. Here, the output voltage is the sensor signal received from the voltage sensor 103a, the total cell voltage value of the power storage device 102 received by the power storage device information receiving unit 202, and the cell calculated by receiving each cell voltage at the power storage device information receiving unit 202. At least one value of the total voltage value is used. Moreover, although the example using the information of the output voltage and the output current is shown here, the output power is an integrated value of the output voltage and the output current, and thus the same is performed by using the value of the output power instead of the output voltage or the output current. It can carry out by the method of.

図５は一実施の形態の充電制御プログラムを示すフローチャートである。この充電制御プログラムは充電制御装置１０７のメモリ(不図示)に記憶されている。充電制御装置１０７のＣＰＵ(不図示)は、充電器１０３が商用電源１０４に接続された時点からこの充電制御プログラムの実行を開始する。Ｓ５０１において充電器１０３と蓄電装置１０２を接続するためのリレー接続処理を行う。充電器１０３と蓄電装置１０２の間にはリレー(不図示)が設置されており、このリレーを閉路して蓄電装置１０２を充電器１０３に接続する処理を行う。リレー接続処理終了後のＳ５０２では上記リレーの動作異常、充電器１０３または蓄電装置１０２の異常、充電制御装置１０７と他のコントローラ（VCU１０８、BCU１０６など）との通信異常の有無を判定し、異常があれば充電処理を終了する。Ｓ５０２で異常なしと判定された場合はＳ５０３へ進み、充電器１０３側の電圧センサ１０３ａにより充電器１０３の出力電圧を検出する。   FIG. 5 is a flowchart showing a charge control program according to an embodiment. This charge control program is stored in a memory (not shown) of the charge control device 107. The CPU (not shown) of the charging control device 107 starts executing this charging control program from the time when the charger 103 is connected to the commercial power source 104. In S501, a relay connection process for connecting the charger 103 and the power storage device 102 is performed. A relay (not shown) is installed between the charger 103 and the power storage device 102, and the relay is closed to connect the power storage device 102 to the charger 103. In S502 after completion of the relay connection process, it is determined whether there is an abnormality in the operation of the relay, an abnormality in the charger 103 or the power storage device 102, an abnormality in communication between the charging control device 107 and another controller (VCU 108, BCU 106, etc.). If there is, the charging process is terminated. If it is determined in S502 that there is no abnormality, the process proceeds to S503, and the output voltage of the charger 103 is detected by the voltage sensor 103a on the charger 103 side.

次に、Ｓ５０４において充電器１０３の出力電圧、出力電流、出力電力の目標値を決定する。上述したように、目標値決定部２０３により図３または図４に示す方法で出力電圧と出力電流、あるいは出力電力と出力電圧または出力電力と出力電流の目標値を決定する。Ｓ５０５で充電器１０３により蓄電装置１０２の充電を行い蓄電装置１０２に電力を供給する。続くＳ５０６で充電器１０３の出力電圧、出力電流、出力電力を検出する。詳細を後述するが、出力電圧は充電器１０３側の電圧センサ１０３ａまたは蓄電装置１０２側の電圧検出回路１０５により検出し、出力電流と出力電力は充電器１０３側の電流センサ１０３ｂと電力センサ１０３ｃによりそれぞれ検出する。   Next, in S504, target values for the output voltage, output current, and output power of the charger 103 are determined. As described above, the target value determination unit 203 determines the output voltage and output current, or the output power and output voltage or the target value of output power and output current by the method shown in FIG. In step S <b> 505, the power storage device 102 is charged by the charger 103 to supply power to the power storage device 102. In subsequent S506, the output voltage, output current, and output power of the charger 103 are detected. As will be described in detail later, the output voltage is detected by the voltage sensor 103a on the charger 103 side or the voltage detection circuit 105 on the power storage device 102 side, and the output current and output power are detected by the current sensor 103b and the power sensor 103c on the charger 103 side. Detect each.

Ｓ５０７において充電の終了条件（詳細後述）が成立しているか否かを判定し、終了条件が満たされていない場合はＳ５０８へ進み、終了条件が成立した場合はこの充電制御プログラムの実行を終了する。終了条件が満たされていない場合はＳ５０８で目標値の変更条件（詳細後述）が成立したか否かを判定し、目標値変更条件が満たされていない場合はＳ５０５へ戻って充電を継続し、目標値変更条件が成立した場合はＳ５０９へ進んで目標値を変更する。   In S507, it is determined whether or not a charging end condition (details will be described later) is satisfied. If the end condition is not satisfied, the process proceeds to S508. If the end condition is satisfied, the execution of the charge control program is ended. . If the end condition is not satisfied, it is determined in S508 whether or not a target value change condition (details will be described later) is satisfied. If the target value change condition is not satisfied, the process returns to S505 to continue charging. When the target value changing condition is satisfied, the process proceeds to S509 to change the target value.

図６に示すタイミングチャートより、上記充電の終了条件と目標値の変更条件について説明する。図６は、図５に示す充電制御プログラムを実行した場合の出力電圧、出力電力、出力電流の目標値と実際に出力検出部２０１（図２参照）で検出される値との関係の一例を示す。充電開始時刻t0から充電時の目標とする出力電圧V0、出力電流I0、出力電力W0を設定する。この一実施の形態では、複数の値が目標値に到達した場合の優先順位は高いほうから電圧、電力、電流としており、図６に示すように充電開始当初の出力電圧、出力電力がそれぞれの目標値V0、W0よりも小さい場合には、出力電流の目標値I0にしたがって出力電流が制御され充電が行われる。その後、充電とともに蓄電装置１０２の電圧が上昇するため出力電力も上昇し、時刻t1で出力電力が目標値W0に到達すると目標値を超えないよう出力電流の目標値I0を徐々に低減して充電が進められる。   The charging end condition and target value changing condition will be described with reference to the timing chart shown in FIG. FIG. 6 shows an example of the relationship between the target values of the output voltage, output power, and output current when the charge control program shown in FIG. 5 is executed and the values actually detected by the output detection unit 201 (see FIG. 2). Show. From the charging start time t0, the target output voltage V0, output current I0, and output power W0 are set. In this embodiment, when a plurality of values reach the target value, the priority is set to voltage, power, and current from the highest, and as shown in FIG. When it is smaller than the target values V0, W0, the output current is controlled according to the target value I0 of the output current, and charging is performed. Thereafter, as the voltage of the power storage device 102 increases with charging, the output power also increases. When the output power reaches the target value W0 at time t1, the target value I0 of the output current is gradually reduced and charged so as not to exceed the target value. Is advanced.

つまり、この一実施の形態では、最も優先順位の高い出力電圧がその目標値V0に到達することを充電の終了条件としており、この終了条件が成立する前に優先順位が第２位の出力電力がその目標値W0に達したら、目標値変更条件が成立したとして出力電力が目標値W0を越えないように出力電流の目標値I0を変更する。なお、充電時に出力電力を目標値W0以下に制御しながら充電を行うことによって、例えば家庭用のコンセントから商用電源１０４（図１参照）を得る場合には、電動自動車１０１を充電するのに必要な電力を家庭用配電電力の範囲内に制限することが可能になる。なお、図６では出力電力の目標値W0を設定して充電時に充電器１０３の出力電力を制御する例を示すが、必ずしも出力電力を制御する必要はなく、充電器１０３の出力電圧と出力電流を制御して充電を行ってもよい。   That is, in this embodiment, the end condition of charging is that the output voltage with the highest priority reaches the target value V0, and the output power with the second highest priority is set before this end condition is satisfied. When the target value W0 is reached, the target value I0 of the output current is changed so that the output power does not exceed the target value W0, assuming that the target value change condition is satisfied. It is necessary to charge the electric vehicle 101 when, for example, the commercial power source 104 (see FIG. 1) is obtained from a household outlet by performing charging while controlling the output power to be equal to or less than the target value W0 during charging. Power can be limited within the range of household distribution power. 6 shows an example in which the output power of the charger 103 is controlled at the time of charging by setting the target value W0 of the output power. However, it is not always necessary to control the output power, and the output voltage and output current of the charger 103 are not necessarily controlled. You may charge by controlling.

図７〜図１０は、図５に示す充電制御プログラムを実行した場合の充電制御例を示すタイミングチャートである。   7 to 10 are timing charts showing examples of charge control when the charge control program shown in FIG. 5 is executed.

《充電制御例１》
図７は、充電器１０３側の電圧センサ１０３ａにより検出した出力電圧と、蓄電装置情報受信部２０２により受信したセル電圧の合計値とを用いて充電を行う制御例を示す。この充電制御例１では、目標値決定部２０３（図２参照）で出力電圧の目標値V0と出力電流の目標値I0を設定するとともに、セル電圧合計値が目標値V0へ到達した時点で充電終了条件が成立したとし、出力電圧と目標電圧V0との差が所定値ΔVよりも小さくなった時点から目標電流I0の変更条件が成立するものとする。図７において、出力電圧とその目標値V0との差が所定値ΔVよりも小さくなる時刻t1以降、充電器１０３側の電圧センサ１０３ａで検出される出力電圧を用いて目標値V0までの充電を継続した場合の出力電圧と出力電流をそれぞれ実線で示し、蓄電装置情報受信部２０２で受信したセル電圧の合計値を用いて出力電圧目標値V0までの充電を行った場合の出力電圧と出力電流をそれぞれ破線で示す。 << Charging control example 1 >>
FIG. 7 shows a control example in which charging is performed using the output voltage detected by the voltage sensor 103 a on the charger 103 side and the total value of the cell voltages received by the power storage device information receiving unit 202. In this charging control example 1, the target value determining unit 203 (see FIG. 2) sets the output voltage target value V0 and the output current target value I0, and charging is performed when the total cell voltage value reaches the target value V0. Assume that the end condition is satisfied, and the condition for changing the target current I0 is satisfied from the time when the difference between the output voltage and the target voltage V0 becomes smaller than a predetermined value ΔV. In FIG. 7, after the time t1 when the difference between the output voltage and the target value V0 becomes smaller than the predetermined value ΔV, charging up to the target value V0 is performed using the output voltage detected by the voltage sensor 103a on the charger 103 side. The output voltage and output current in the case of continuing are indicated by solid lines, respectively, and charging to the output voltage target value V0 is performed using the total value of the cell voltages received by the power storage device information receiving unit 202 Are indicated by broken lines.

充電開始時刻t0から電圧センサ１０３ａにより検出される出力電圧を用いて充電が開始され、出力電圧が目標値V0より低いため出力電流の目標値I0で蓄電装置１０２が充電され、出力電圧が上昇する。出力電圧とその目標値V0との差が所定値ΔVよりも小さくなる時刻t1以降は、蓄電装置情報受信部２０２で受信したセル電圧合計値、または蓄電装置情報受信部２０２で受信した各セル電圧を蓄電装置情報受信部２０２で合計したセル電圧合計値を用いて充電を継続する。なお、セル電圧の合計値による充電制御に切り替えた時刻t1において、図７に破線で示すように、セル電圧の合計値は電圧センサ１０３ａにより検出される出力電圧よりも低く、セル電圧の合計値と出力電圧目標値V0との差が所定値ΔVよりも小さくなる時刻t2までは出力電流の目標値I0で蓄電装置１０２の充電が継続され、時刻t2以降は出力電流目標値I0が上述したように低減される。   Charging is started from the charging start time t0 using the output voltage detected by the voltage sensor 103a. Since the output voltage is lower than the target value V0, the power storage device 102 is charged with the target value I0 of the output current, and the output voltage rises. . After time t1 when the difference between the output voltage and the target value V0 becomes smaller than the predetermined value ΔV, the total cell voltage value received by the power storage device information receiving unit 202 or each cell voltage received by the power storage device information receiving unit 202 Charging is continued using the total cell voltage value obtained by summing the power storage device information reception unit 202. At time t1 when switching to charge control based on the total value of the cell voltage is performed, as shown by a broken line in FIG. 7, the total value of the cell voltage is lower than the output voltage detected by the voltage sensor 103a, and the total value of the cell voltage. Until the time t2 when the difference between the output voltage target value V0 and the output voltage target value V0 becomes smaller than the predetermined value ΔV, charging of the power storage device 102 is continued at the output current target value I0, and after time t2, the output current target value I0 is as described above. Reduced to

ここで、出力電圧と目標値V0との所定差ΔVは出力電圧を検出する電圧センサ１０３ａ(図１参照）の検出精度によって決まる値であり、この一実施の形態では検出誤差±１％の電圧センサ１０３ａを用い、所定差ΔVは出力電圧の目標値V0×0.02とした。なお、所定差ΔVの値はこの実施の形態の値に限定されるものではなく、電圧センサ１０３ａの検出誤差に基づいて任意に設定可能である。   Here, the predetermined difference ΔV between the output voltage and the target value V0 is a value determined by the detection accuracy of the voltage sensor 103a (see FIG. 1) that detects the output voltage, and in this embodiment, a voltage with a detection error of ± 1%. The sensor 103a was used, and the predetermined difference ΔV was set to the output voltage target value V0 × 0.02. The value of the predetermined difference ΔV is not limited to the value in this embodiment, and can be arbitrarily set based on the detection error of the voltage sensor 103a.

図７から明らかなように、時刻t1以降、電圧センサ１０３ａの検出電圧から蓄電装置情報受信部２０２のセル電圧の合計値に切り替えて充電を継続する方が、より出力電圧目標値V0に近い値まで蓄電装置１０２の充電を行うことができる。   As is clear from FIG. 7, after time t1, the value that is closer to the output voltage target value V0 is obtained by switching from the detected voltage of the voltage sensor 103a to the total value of the cell voltages of the power storage device information receiving unit 202 and continuing charging. Until the power storage device 102 can be charged.

ここで、図１に示すBCU１０６は、蓄電装置１０２の各セルの過充電状態や過放電状態などを正確に管理するために、各セルの電圧を正確に取得する必要がある。そのため、蓄電装置１０２の電圧検出回路１０５は各セルの電圧を正確に検出可能なように設計される。したがって、このような検出精度の高い電圧検出回路１０５で検出された各セルの電圧またはその合計値を用いて充電制御を行えば、出力電圧目標値V0の近傍まで充電を行うことができる。ところが、電圧検出回路１０５によりすべてのセルの電圧を検出するには時間がかかるため、出力電圧変化が大きい充電初期、つまり時刻t1までの初期充電期間においては、電圧検出回路１０５の各セル電圧またはその合計値を用いて充電制御を行うよりも、検出タイムラグが小さい充電器側電圧センサ１０３ａを用いて充電制御する方が、制御応答性と制御精度の面からより好適な充電制御が可能となる。   Here, the BCU 106 illustrated in FIG. 1 needs to accurately acquire the voltage of each cell in order to accurately manage the overcharge state and the overdischarge state of each cell of the power storage device 102. Therefore, the voltage detection circuit 105 of the power storage device 102 is designed so that the voltage of each cell can be accurately detected. Therefore, if charge control is performed using the voltage of each cell detected by the voltage detection circuit 105 having such a high detection accuracy or the total value thereof, charging can be performed up to the vicinity of the output voltage target value V0. However, since it takes time to detect the voltages of all the cells by the voltage detection circuit 105, each cell voltage of the voltage detection circuit 105 or the voltage in the initial charge period where the output voltage change is large, that is, the initial charge period up to time t1. Rather than performing charge control using the total value, charge control using the charger-side voltage sensor 103a having a small detection time lag enables more favorable charge control in terms of control responsiveness and control accuracy. .

さらに、時刻t1で充電器側電圧センサ１０３ａにより検出される出力電圧から電圧検出回路１０５により検出される各セル電圧の合計値に切り替えて充電を行う方法によれば、時刻t1までの充電制御に用いる充電器側電圧センサ１０３ａには検出精度の低いセンサを用いることが可能になり、装置のコストを低減することができる。   Furthermore, according to the method of charging by switching from the output voltage detected by the charger side voltage sensor 103a at the time t1 to the total value of each cell voltage detected by the voltage detection circuit 105, the charging control up to the time t1 can be performed. As the charger-side voltage sensor 103a to be used, a sensor with low detection accuracy can be used, and the cost of the apparatus can be reduced.

このように、この一実施の形態では蓄電装置１０２の電圧検出回路１０５が充電器１０３の電圧センサ１０３ａよりも高精度なため、図７に示すように、出力電圧と目標値V0との差が所定値ΔV以下になる領域、つまり時刻t1以降で高精度な蓄電装置１０２のセル電圧合計値を用いることができ、出力電圧目標値V0近傍まで蓄電装置１０２を充電することができる。   Thus, in this embodiment, since the voltage detection circuit 105 of the power storage device 102 is more accurate than the voltage sensor 103a of the charger 103, the difference between the output voltage and the target value V0 is as shown in FIG. It is possible to use a highly accurate cell voltage total value of the power storage device 102 in a region that is equal to or less than the predetermined value ΔV, that is, after time t1, and to charge the power storage device 102 to the vicinity of the output voltage target value V0.

なお、図７に示す充電制御例１において、充電開始時刻t0から蓄電装置１０２のセル電圧合計値のみを用いて充電制御を行ってもよい。   In charge control example 1 shown in FIG. 7, charge control may be performed using only the total cell voltage value of power storage device 102 from charge start time t0.

《充電制御例２》
図８は、充電器側電圧センサ１０３ａにより検出した出力電圧と、蓄電装置情報受信部２０２により受信したセル電圧の合計値とを用いて充電を行う他の制御例を示す。この充電制御例２では、目標値決定部２０３（図２参照）で出力電圧の目標値V0と出力電流の目標値I0を設定するとともに、セル電圧合計値が目標値V0へ到達した時点で充電終了条件が成立したとし、出力電圧が所定電圧V1を越えた時点から目標電流I0の変更条件が成立するものとする。図８において、出力電圧が所定電圧V1を越えた時刻t1以降、充電器側電圧センサ１０３ａで検出される出力電圧を用いて目標値V0までの充電を継続した場合の出力電圧と出力電流をそれぞれ実線で示し、蓄電装置情報受信部２０２で受信したセル電圧の合計値を用いて出力電圧目標値V0までの充電を行った場合の出力電圧と出力電流をそれぞれ破線で示す。 << Charge control example 2 >>
FIG. 8 shows another control example in which charging is performed using the output voltage detected by the charger-side voltage sensor 103 a and the total value of the cell voltages received by the power storage device information receiving unit 202. In this charging control example 2, the target value determining unit 203 (see FIG. 2) sets the output voltage target value V0 and the output current target value I0, and charging is performed when the total cell voltage value reaches the target value V0. Assume that the end condition is satisfied, and the condition for changing the target current I0 is satisfied from the time when the output voltage exceeds the predetermined voltage V1. In FIG. 8, after the time t1 when the output voltage exceeds the predetermined voltage V1, the output voltage and the output current when charging to the target value V0 is continued using the output voltage detected by the charger side voltage sensor 103a, respectively. The solid line shows the output voltage and the output current when charging up to the output voltage target value V0 using the total value of the cell voltages received by the power storage device information receiving unit 202, respectively.

充電開始時刻t0から電圧センサ１０３ａにより検出される出力電圧を用いて充電が開始され、出力電圧が目標値V0より低いため出力電流の目標値I0で蓄電装置１０２が充電され、出力電圧が上昇する。出力電圧が所定電圧V1を越える時刻t1以降は、蓄電装置情報受信部２０２で受信したセル電圧合計値、または蓄電装置情報受信部２０２で受信した各セル電圧を蓄電装置情報受信部２０２で合計したセル電圧合計値を用いて充電を継続する。なお、セル電圧の合計値による充電制御に切り替えた時刻t1において、図８に破線で示すように、セル電圧の合計値は電圧センサ１０３ａにより検出される出力電圧よりも低く、セル電圧の合計値が所定電圧V1を越える時刻t2までは出力電流の目標値I0で蓄電装置１０２の充電が継続され、時刻t2以降は出力電流目標値I0が上述したように低減される。   Charging is started from the charging start time t0 using the output voltage detected by the voltage sensor 103a. Since the output voltage is lower than the target value V0, the power storage device 102 is charged with the target value I0 of the output current, and the output voltage rises. . After the time t1 when the output voltage exceeds the predetermined voltage V1, the total cell voltage value received by the power storage device information receiving unit 202 or each cell voltage received by the power storage device information receiving unit 202 is summed by the power storage device information receiving unit 202. Charging is continued using the total cell voltage value. Note that at time t1 when switching to charge control based on the total value of the cell voltage is performed, as shown by a broken line in FIG. 8, the total value of the cell voltage is lower than the output voltage detected by the voltage sensor 103a, and the total value of the cell voltage. Until the time t2 when the voltage exceeds the predetermined voltage V1, charging of the power storage device 102 is continued with the target value I0 of the output current, and after the time t2, the output current target value I0 is reduced as described above.

ここで、所定電圧V1は充電器側電圧センサ１０３ａの検出精度によって決まる値であり、この一実施の形態では検出誤差±１％の電圧センサ１０３ａを用いたため、蓄電装置に印加可能な最大電圧の98%とした。なお、所定電圧V1の値はこの値に限定されず、電圧センサ１０３ａの検出精度に応じて任意に設定可能である。   Here, the predetermined voltage V1 is a value determined by the detection accuracy of the charger-side voltage sensor 103a. In this embodiment, the voltage sensor 103a having a detection error of ± 1% is used. 98%. The value of the predetermined voltage V1 is not limited to this value, and can be arbitrarily set according to the detection accuracy of the voltage sensor 103a.

この一実施の形態では蓄電装置１０２の電圧検出回路１０５が充電器１０３の電圧センサ１０３ａよりも高精度なため、図８に示すように、出力電圧が所定電圧V1を越える領域、つまり時刻t1以降で高精度な蓄電装置１０２のセル電圧の合計値を用いることができ、出力電圧目標値V0近傍まで蓄電装置１０２を充電することができる。   In this embodiment, since the voltage detection circuit 105 of the power storage device 102 is more accurate than the voltage sensor 103a of the charger 103, as shown in FIG. 8, the region where the output voltage exceeds the predetermined voltage V1, that is, after time t1 Thus, the total value of the cell voltages of the power storage device 102 with high accuracy can be used, and the power storage device 102 can be charged to the vicinity of the output voltage target value V0.

なお、図８に示す充電制御例２において、充電開始時刻t0から蓄電装置１０２のセル電圧の合計値のみを用いて充電制御を行ってもよい。   In charge control example 2 shown in FIG. 8, charge control may be performed using only the total value of the cell voltages of power storage device 102 from charge start time t0.

《充電制御例３》
図９は、図７に示す充電制御例１にセル電圧を計測するための充電停止区間を設けた例を示す。一般に、セルに電流が流れている間、セル電圧は変化するため、正確なセル電圧を検出することが難しい。そこで、出力電圧と目標値V0の差が所定値ΔVよりも小さくなる時刻t1以降、セル電圧の合計値を用いて充電を制御しながら、任意のタイミングと期間で充電停止区間を少なくとも１回設け、セル電圧を検出してその合計値を演算する。時刻t1以降にセル電圧検出のための充電停止区間を設ける以外は図７に示す充電制御例１と同様であり、充電制御の説明を省略する。図９に示す例では、時刻t2からt3までの間に充電停止区間を設け、この充電停止区間で計測演算したセル電圧の合計値を用いて時刻t3から充電を再開する。 << Charge Control Example 3 >>
FIG. 9 shows an example in which a charge stop section for measuring the cell voltage is provided in the charge control example 1 shown in FIG. In general, the cell voltage changes while a current flows through the cell, so that it is difficult to detect an accurate cell voltage. Therefore, after time t1 when the difference between the output voltage and the target value V0 becomes smaller than the predetermined value ΔV, charging is controlled using the total value of the cell voltages, and at least one charging stop period is provided at any timing and period. The cell voltage is detected and the total value is calculated. Except for providing the charge stop section for detecting the cell voltage after time t1, it is the same as the charge control example 1 shown in FIG. 7, and the description of the charge control is omitted. In the example shown in FIG. 9, a charge stop period is provided between time t2 and t3, and charging is resumed from time t3 using the total value of the cell voltages measured and calculated in this charge stop period.

この充電制御例３における充電停止区間のタイミングと期間は、蓄電装置１０２の残容量とセル電圧の合計値の算出方法によって決定する。この一実施の形態では、充電停止区間のタイミングを蓄電装置１０２の残容量が％換算で１％上昇するごとに実施し、その期間は蓄電装置１０２内の全てのセル電圧の合計値を５回以上計測可能な時間とした。セル電圧の合計値は５回の計測演算結果の平均値を採用する。なお、充電停止区間とその期間の決定方法はこの一実施の形態の方法に限定されるものではなく、任意に決定することができる。   The timing and period of the charging stop period in the charging control example 3 are determined by a calculation method of the total value of the remaining capacity and the cell voltage of the power storage device 102. In this embodiment, the timing of the charging stop period is performed every time the remaining capacity of the power storage device 102 increases by 1% in terms of%, and during that period, the total value of all the cell voltages in the power storage device 102 is calculated five times. This is the time that can be measured. As the total value of the cell voltages, an average value of five measurement calculation results is adopted. In addition, the determination method of a charge stop area and its period is not limited to the method of this one Embodiment, It can determine arbitrarily.

この充電制御例３によればセル電圧をより正確に検出することができ、出力電圧目標値V0近傍まで蓄電装置１０２を充電することができる。   According to the charge control example 3, the cell voltage can be detected more accurately, and the power storage device 102 can be charged to the vicinity of the output voltage target value V0.

《充電制御例４》
図１０は、充電器側電圧センサ１０３ａにより検出した出力電圧を蓄電装置情報受信部２０２で受信したセル電圧の合計値で補正して充電を行う制御例を示す。この充電制御例４では、目標値決定部２０３（図２参照）で出力電圧の目標値V0と出力電流の目標値I0を設定するとともに、出力電圧が目標値V0へ到達した時点で充電終了条件が成立したとし、出力電圧と目標電圧V0との差が所定値ΔVよりも小さくなった時点から目標電流I0の変更条件が成立するものとする。図１０において、出力電圧とその目標値V0との差が所定値ΔVよりも小さくなる時刻t1以降、充電器側電圧センサ１０３ａで検出される出力電圧を蓄電装置情報受信部２０２で得たセル電圧の合計値により補正した出力電圧と出力電流を実線で示し、蓄電装置情報受信部２０２で得たセル電圧の合計値を破線で示す。 << Charge Control Example 4 >>
FIG. 10 illustrates a control example in which charging is performed by correcting the output voltage detected by the charger-side voltage sensor 103a with the total value of the cell voltages received by the power storage device information receiving unit 202. In the charge control example 4, the target value determination unit 203 (see FIG. 2) sets the target value V0 of the output voltage and the target value I0 of the output current, and the charge termination condition when the output voltage reaches the target value V0. Assume that the condition for changing the target current I0 is satisfied from the time when the difference between the output voltage and the target voltage V0 becomes smaller than the predetermined value ΔV. In FIG. 10, after time t1 when the difference between the output voltage and its target value V0 becomes smaller than the predetermined value ΔV, the cell voltage obtained by the power storage device information receiving unit 202 is the output voltage detected by the charger side voltage sensor 103a. The output voltage and the output current corrected by the total value are indicated by a solid line, and the total value of the cell voltages obtained by the power storage device information receiving unit 202 is indicated by a broken line.

充電開始時刻t0から電圧センサ１０３ａにより検出される出力電圧を用いて充電が開始され、出力電圧が目標値V0より低いため出力電流の目標値I0で蓄電装置１０２が充電され、出力電圧が上昇する。出力電圧とその目標値V0との差が所定値ΔVよりも小さくなる時刻t1以降は、蓄電装置情報受信部２０２で受信したセル電圧合計値、または蓄電装置情報受信部２０２で受信した各セル電圧を蓄電装置情報受信部２０２で合計したセル電圧合計値を用いて充電器側電圧センサ１０３ａで検出した出力電圧を補正し、補正後の出力電圧により充電を継続する。なお、セル電圧の合計値により補正した出力電圧により充電を開始した時刻t1において、出力電圧補正値は電圧センサ１０３ａにより検出される出力電圧よりも低く、出力電圧補正値と目標値V0との差が所定値ΔVよりも小さくなる時刻t2までは出力電流の目標値I0で蓄電装置１０２の充電が継続され、時刻t2以降は出力電流目標値I0が上述したように低減される。   Charging is started from the charging start time t0 using the output voltage detected by the voltage sensor 103a. Since the output voltage is lower than the target value V0, the power storage device 102 is charged with the target value I0 of the output current, and the output voltage rises. . After time t1 when the difference between the output voltage and the target value V0 becomes smaller than the predetermined value ΔV, the total cell voltage value received by the power storage device information receiving unit 202 or each cell voltage received by the power storage device information receiving unit 202 The output voltage detected by the charger-side voltage sensor 103a is corrected using the total cell voltage value obtained by summing the power storage device information receiving unit 202, and charging is continued with the corrected output voltage. At time t1 when charging is started with the output voltage corrected by the total cell voltage value, the output voltage correction value is lower than the output voltage detected by the voltage sensor 103a, and the difference between the output voltage correction value and the target value V0. Until the time t2 when becomes smaller than the predetermined value ΔV, charging of the power storage device 102 is continued at the target value I0 of the output current, and after the time t2, the output current target value I0 is reduced as described above.

この充電制御例４によれば、充電開始後の出力電圧と目標電圧の差が所定値ΔVよりも小さくなるt1以降は、高精度なセル電圧の合計値により充電器側で検出した出力電圧を補正し、出力電圧補正値により充電を継続する。これにより、出力電圧の電圧検出誤差を低減することができるため、出力電圧目標値V0の近傍までより高精度に充電が可能となる。   According to this charge control example 4, after t1 when the difference between the output voltage after the start of charging and the target voltage becomes smaller than the predetermined value ΔV, the output voltage detected on the charger side by the total value of the high-accuracy cell voltages is used. Correct and continue charging with the output voltage correction value. As a result, the voltage detection error of the output voltage can be reduced, so that charging can be performed with higher accuracy up to the vicinity of the output voltage target value V0.

上述した図７〜図１０に示す充電制御例１〜４では出力電圧と出力電流を用いて充電を制御する例を示したが、出力電力は出力電圧と出力電流の積であるから、出力電圧と出力電力または出力電流と出力電力を用いて充電を制御することももちろん可能であり、その場合の充電制御は上述した図７〜図１０に示す充電制御例１〜４と同様である。   In the charge control examples 1 to 4 shown in FIGS. 7 to 10 described above, the example in which charging is controlled using the output voltage and the output current is shown. However, since the output power is the product of the output voltage and the output current, the output voltage It is of course possible to control charging using output power or output current and output power, and the charge control in that case is the same as the charge control examples 1 to 4 shown in FIGS.

なお、上述した実施の形態とそれらの変形例において、実施の形態どうし、または実施の形態と変形例とのあらゆる組み合わせが可能である。   In the above-described embodiments and their modifications, all combinations of the embodiments or the embodiments and the modifications are possible.

上述した実施の形態とその変形例によれば以下のような作用効果を奏することができる。
（１）まず、直列接続された複数のセル１０２ａと各セル１０２ａのセル電圧を検出する電圧検出回路１０５とを有する蓄電装置１０２の充電器１０３を制御する充電制御装置１０７であって、充電器１０３の出力電圧を検出する電圧センサ１０３ａを備え、蓄電装置１０２の充電目標電圧V0と電圧センサ１０３ａにより検出された出力電圧との比較結果、および充電目標電圧V0と電圧検出回路１０５により検出されたセル電圧の合計値との比較結果に基づいて、充電器１０３による蓄電装置１０２の充電を制御するようにしたので、蓄電装置１０２の総電圧を正確に検知して蓄電装置１０２を高い充電量まで高精度に充電することができる。 According to the above-described embodiment and its modifications, the following operational effects can be achieved.
(1) First, a charge control device 107 that controls a charger 103 of a power storage device 102 having a plurality of cells 102a connected in series and a voltage detection circuit 105 that detects a cell voltage of each cell 102a, 103, a voltage sensor 103a that detects the output voltage 103, a comparison result between the charging target voltage V0 of the power storage device 102 and the output voltage detected by the voltage sensor 103a, and the charging target voltage V0 and the voltage detection circuit 105 Since the charging of the power storage device 102 by the charger 103 is controlled based on the comparison result with the total value of the cell voltage, the total voltage of the power storage device 102 is accurately detected to bring the power storage device 102 to a high charge amount. It can be charged with high accuracy.

（２）一実施の形態とその変形例によれば、電圧センサ１０３ａにより検出された出力電圧が充電目標電圧V0よりも低い所定の電圧に到達するまでは、充電目標電圧V0と出力電圧との比較結果に基づいて充電を制御し、出力電圧が所定の電圧に到達した後は、充電目標電圧V0と電圧検出回路１０５により検出されたセル電圧の合計値との比較結果に基づいて充電を制御するようにしたので、上記効果に加え、出力電圧が充電目標電圧V0より低い所定の電圧に到達するまでの充電初期には、安価な電圧センサ１０３ａにより高応答の充電制御を実現でき、所定の電圧に到達した後は、検出精度の高い電圧検出回路１０５を用いて高精度な充電制御を実現することができる。 (2) According to one embodiment and the modification thereof, until the output voltage detected by the voltage sensor 103a reaches a predetermined voltage lower than the charge target voltage V0, the charge target voltage V0 and the output voltage Charging is controlled based on the comparison result, and after the output voltage reaches a predetermined voltage, charging is controlled based on the comparison result between the charging target voltage V0 and the total value of the cell voltages detected by the voltage detection circuit 105. In addition to the above effects, in the initial stage of charging until the output voltage reaches a predetermined voltage lower than the charging target voltage V0, high-response charging control can be realized by an inexpensive voltage sensor 103a. After reaching the voltage, highly accurate charge control can be realized using the voltage detection circuit 105 with high detection accuracy.

（３）一実施の形態とその変形例によれば、電圧センサ１０３ａにより検出された出力電圧が充電目標電圧V0よりも低い所定の電圧に到達するまでは、充電目標電圧V0と出力電圧との比較結果に基づいて充電を制御し、出力電圧が所定の電圧に到達した後は、電圧検出回路１０５により検出されたセル電圧の合計値により電圧センサ１０３ａにより検出された出力電圧を補正し、充電目標電圧V0と補正後の出力電圧との比較結果に基づいて充電を制御するようにしたので、上記効果に加え、出力電圧が充電目標電圧V0より低い所定の電圧に到達するまでの充電初期には、安価な電圧センサ１０３ａにより高応答の充電制御を実現でき、所定の電圧に到達した後は、検出精度の高い電圧検出回路１０５を用いて高精度な充電制御を実現することができる。 (3) According to one embodiment and the modification thereof, until the output voltage detected by the voltage sensor 103a reaches a predetermined voltage lower than the charge target voltage V0, the charge target voltage V0 and the output voltage Charging is controlled based on the comparison result, and after the output voltage reaches a predetermined voltage, the output voltage detected by the voltage sensor 103a is corrected by the total value of the cell voltages detected by the voltage detection circuit 105, and charging is performed. Since charging is controlled based on the comparison result between the target voltage V0 and the corrected output voltage, in addition to the above effects, at the initial stage of charging until the output voltage reaches a predetermined voltage lower than the charging target voltage V0. Can realize high-response charge control by an inexpensive voltage sensor 103a, and can achieve high-accuracy charge control using the voltage detection circuit 105 having high detection accuracy after reaching a predetermined voltage. Kill.

（４）一実施の形態とその変形例によれば、直列接続された複数のセル１０２ａと各セル１０２ａのセル電圧を検出する電圧検出回路１０５とを有する蓄電装置１０２の充電器１０３を制御する充電制御装置１０７であって、蓄電装置１０２の充電目標電圧V0と電圧検出回路１０５により検出されたセル電圧の合計値との比較結果に基づいて、充電器１０３による蓄電装置１０２の充電を制御するようにしたので、蓄電装置１０２の総電圧を正確に検知して蓄電装置１０２を高い充電量まで高精度に充電することができる。 (4) According to one embodiment and its modification, the charger 103 of the power storage device 102 having the plurality of cells 102a connected in series and the voltage detection circuit 105 that detects the cell voltage of each cell 102a is controlled. The charging control device 107 controls charging of the power storage device 102 by the charger 103 based on a comparison result between the target charging voltage V0 of the power storage device 102 and the total value of the cell voltages detected by the voltage detection circuit 105. Since it did in this way, the total voltage of the electrical storage apparatus 102 can be detected correctly, and the electrical storage apparatus 102 can be charged to a high charge amount with high precision.

１０２；蓄電装置、１０２ａ；セル、１０３；充電器、１０３ａ；電圧センサ、１０３ｂ；電流センサ、１０３ｃ；電力センサ、１０７；充電制御装置、２０１；出力検出部、２０２；蓄電装置情報受信部、２０３；目標値決定部、２０４；出力決定部 102; Power storage device, 102a; Cell, 103; Charger, 103a; Voltage sensor, 103b; Current sensor, 103c; Power sensor, 107; Charge control device, 201; Output detection unit, 202: Power storage device information reception unit, 203 ; Target value determination unit, 204; output determination unit

Claims (8)

直列接続された複数のセルと各セルのセル電圧を検出するセル電圧検出回路とを有する蓄電装置の充電器を制御する充電制御装置であって、
前記充電器の出力電圧を検出する出力電圧検出回路と、
前記蓄電装置の充電目標電圧と前記出力電圧検出回路により検出された前記出力電圧との比較結果、および前記充電目標電圧と前記セル電圧検出回路により検出された前記セル電圧の合計値との比較結果に基づいて、前記充電器による前記蓄電装置の充電を制御する制御回路とを備えることを特徴とする充電制御装置。 A charge control device that controls a charger of a power storage device having a plurality of cells connected in series and a cell voltage detection circuit that detects a cell voltage of each cell,
An output voltage detection circuit for detecting an output voltage of the charger;
Comparison result between the charge target voltage of the power storage device and the output voltage detected by the output voltage detection circuit, and comparison result between the charge target voltage and the total value of the cell voltages detected by the cell voltage detection circuit And a control circuit for controlling charging of the power storage device by the charger. 請求項１に記載の充電制御装置において、
前記制御回路は、前記出力電圧検出回路により検出された前記出力電圧が前記充電目標電圧よりも低い所定の電圧に到達するまでは、前記充電目標電圧と前記出力電圧との比較結果に基づいて充電を制御し、前記出力電圧が前記所定の電圧に到達した後は、前記充電目標電圧と前記セル電圧検出回路により検出された前記セル電圧の合計値との比較結果に基づいて充電を制御することを特徴とする充電制御装置。 The charge control device according to claim 1,
The control circuit performs charging based on a comparison result between the target charging voltage and the output voltage until the output voltage detected by the output voltage detecting circuit reaches a predetermined voltage lower than the target charging voltage. After the output voltage reaches the predetermined voltage, charging is controlled based on a comparison result between the charging target voltage and the total value of the cell voltages detected by the cell voltage detection circuit. A charge control device. 請求項１に記載の充電制御装置において、
前記制御回路は、前記出力電圧検出回路により検出された前記出力電圧が前記充電目標電圧よりも低い所定の電圧に到達するまでは、前記充電目標電圧と前記出力電圧との比較結果に基づいて充電を制御し、前記出力電圧が前記所定の電圧に到達した後は、前記セル電圧検出回路により検出された前記セル電圧の合計値により前記出力電圧検出回路により検出された前記出力電圧を補正し、前記充電目標電圧と補正後の前記出力電圧との比較結果に基づいて充電を制御することを特徴とする充電制御装置。 The charge control device according to claim 1,
The control circuit performs charging based on a comparison result between the target charging voltage and the output voltage until the output voltage detected by the output voltage detecting circuit reaches a predetermined voltage lower than the target charging voltage. After the output voltage reaches the predetermined voltage, the output voltage detected by the output voltage detection circuit is corrected by the total value of the cell voltages detected by the cell voltage detection circuit, A charge control apparatus that controls charging based on a comparison result between the charge target voltage and the corrected output voltage. 直列接続された複数のセルと各セルのセル電圧を検出するセル電圧検出回路とを有する蓄電装置の充電器を制御する充電制御装置であって、
前記蓄電装置の充電目標電圧と前記セル電圧検出回路により検出された前記セル電圧の合計値との比較結果に基づいて、前記充電器による前記蓄電装置の充電を制御する制御回路を備えることを特徴とする充電制御装置。 A charge control device that controls a charger of a power storage device having a plurality of cells connected in series and a cell voltage detection circuit that detects a cell voltage of each cell,
And a control circuit that controls charging of the power storage device by the charger based on a comparison result between a target charging voltage of the power storage device and a total value of the cell voltages detected by the cell voltage detection circuit. Charge control device. 請求項１〜４のいずれか一項に記載の充電制御装置において、
前記制御回路は、前記充電目標電圧と前記出力電圧または前記セル電圧の合計値との比較結果に基づいて、前記充電器の出力電力または出力電流の目標値を決定する目標値決定回路を有し、前記目標値決定回路により決定された目標値により前記充電器の出力電力または出力電流を制御することを特徴とする充電制御装置。 In the charge control device according to any one of claims 1 to 4,
The control circuit includes a target value determining circuit that determines a target value of output power or output current of the charger based on a comparison result between the charging target voltage and a total value of the output voltage or the cell voltage. A charge control device that controls output power or output current of the charger according to a target value determined by the target value determination circuit. 請求項５に記載の充電制御装置において、
前記目標値決定回路は、前記充電器の出力電力が前記目標値に到達した後は、前記充電器の出力電力が目標値を越えないように前記充電器の出力電流の目標値を低減することを特徴とする充電制御装置。 In the charging control device according to claim 5,
The target value determining circuit reduces the target value of the output current of the charger so that the output power of the charger does not exceed the target value after the output power of the charger reaches the target value. A charge control device. 請求項５に記載の充電制御装置において、
前記目標値決定回路は、前記出力電圧検出回路により検出された前記出力電圧または前記セル電圧検出回路により検出された前記セル電圧の合計値が前記充電目標電圧よりも低い所定の電圧に到達した後は、前記充電器の出力電流の目標値を徐々に低減することを特徴とする充電制御装置。 In the charging control device according to claim 5,
After the target value determination circuit reaches a predetermined voltage in which the output voltage detected by the output voltage detection circuit or the total value of the cell voltages detected by the cell voltage detection circuit reaches a predetermined voltage lower than the charge target voltage Is a charging control device characterized by gradually reducing the target value of the output current of the charger. 請求項１〜７のいずれか一項に記載の充電制御装置において、
前記制御回路は、前記セル電圧検出回路により各セルの電圧検出を行うときに、前記充電器の出力電流を０にして充電を一時停止することを特徴とする充電制御装置。 In the charge control device according to any one of claims 1 to 7,
The control circuit temporarily stops charging by setting the output current of the charger to 0 when the cell voltage detection circuit detects the voltage of each cell.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015042013A (en) * 2013-08-20 2015-03-02 株式会社デンソー Charging device
US10804720B2 (en) 2017-02-20 2020-10-13 Seiko Epson Corporation Battery charging apparatus and recording apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108995551B (en) * 2018-07-23 2020-07-03 中车青岛四方车辆研究所有限公司 Storage battery emergency charging circuit for motor car
JP2022068661A (en) * 2020-10-22 2022-05-10 株式会社デンソー Charge control device

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08186940A (en) * 1994-12-29 1996-07-16 Nissan Motor Co Ltd Charge control circuit for combined battery
JPH0984274A (en) * 1995-09-14 1997-03-28 Nissan Motor Co Ltd Charge controller for battery pack
WO1997044878A1 (en) * 1996-05-21 1997-11-27 Matsushita Electric Industrial Co., Ltd. Pulse charging method and a charger
JP2001245438A (en) * 2000-02-29 2001-09-07 Matsushita Electric Works Ltd Battery charger
JP2003111295A (en) * 2001-09-27 2003-04-11 Nec Tokin Tochigi Ltd Charger using battery pack function
JP2005020866A (en) * 2003-06-25 2005-01-20 Ntt Power & Building Facilities Inc Battery charger
JP2005318790A (en) * 2004-03-30 2005-11-10 Matsushita Electric Ind Co Ltd Charger
JP2006288090A (en) * 2005-03-31 2006-10-19 Ricoh Co Ltd Capacitor apparatus, charging method for the same and image forming apparatus
JP2007033320A (en) * 2005-07-28 2007-02-08 Nissan Motor Co Ltd Voltage detection device for battery pack
JP2007259615A (en) * 2006-03-24 2007-10-04 Power System:Kk Charger or discharger for capacitor storage power supply

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3750412B2 (en) 1999-04-12 2006-03-01 日産自動車株式会社 In-vehicle battery control system
US6459237B1 (en) * 2000-06-13 2002-10-01 Hewlett-Packard Company Battery charger apparatus and method
US7180268B2 (en) * 2004-03-25 2007-02-20 O2Micro International Limited Circuits capable of trickle precharge and/or trickle discharge
US7656131B2 (en) * 2005-10-31 2010-02-02 Black & Decker Inc. Methods of charging battery packs for cordless power tool systems
EP1796243B1 (en) * 2005-10-31 2014-12-03 Black & Decker Inc. Methods of charging battery packs for cordless power tool systems
JP2009017651A (en) * 2007-07-03 2009-01-22 Lenovo Singapore Pte Ltd Overvoltage protection system, battery pack and electronic equipment
JP2010218817A (en) 2009-03-16 2010-09-30 Nippon Soken Inc Fuel cell

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08186940A (en) * 1994-12-29 1996-07-16 Nissan Motor Co Ltd Charge control circuit for combined battery
JPH0984274A (en) * 1995-09-14 1997-03-28 Nissan Motor Co Ltd Charge controller for battery pack
WO1997044878A1 (en) * 1996-05-21 1997-11-27 Matsushita Electric Industrial Co., Ltd. Pulse charging method and a charger
JP2001245438A (en) * 2000-02-29 2001-09-07 Matsushita Electric Works Ltd Battery charger
JP2003111295A (en) * 2001-09-27 2003-04-11 Nec Tokin Tochigi Ltd Charger using battery pack function
JP2005020866A (en) * 2003-06-25 2005-01-20 Ntt Power & Building Facilities Inc Battery charger
JP2005318790A (en) * 2004-03-30 2005-11-10 Matsushita Electric Ind Co Ltd Charger
JP2006288090A (en) * 2005-03-31 2006-10-19 Ricoh Co Ltd Capacitor apparatus, charging method for the same and image forming apparatus
JP2007033320A (en) * 2005-07-28 2007-02-08 Nissan Motor Co Ltd Voltage detection device for battery pack
JP2007259615A (en) * 2006-03-24 2007-10-04 Power System:Kk Charger or discharger for capacitor storage power supply

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015042013A (en) * 2013-08-20 2015-03-02 株式会社デンソー Charging device
US10804720B2 (en) 2017-02-20 2020-10-13 Seiko Epson Corporation Battery charging apparatus and recording apparatus

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